Chloromethane
Town of Snow Hill
Chloromethane is an industrial solvent, aerosol propellant and a refrigerant. It also forms as a byproduct of water disinfection. The EPA classifies chloromethane as possibly carcinogenic to humans.
9
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 6 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | 0.510 ppb | 1 | 1 | 0.510 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | 0.650 ppb | 1 | 1 | 0.650 ppb |
| 2023 | 1.28 ppb | 1 | 1 | 1.28 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 2.69 ppb
The EWG Health Guideline of 2.69 ppb for chloromethane was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-04-08 | 106569P | ND |
| 2014-04-08 | 106570P | ND |
| 2014-04-08 | 106571P | ND |
| 2014-10-08 | 109422P | ND |
| 2014-10-14 | 109423P | ND |
| 2014-11-05 | 109805R | ND |
| 2019-06-11 | E19004254001 | 0.510 ppb |
| 2022-03-29 | E2201004201 | 0.650 ppb |
| 2023-06-15 | E2300287601 | 1.28 ppb |